var validez = 30;
var caduca = new Date(); 
caduca.setTime(caduca.getTime() + (validez*24*60*60*1000));

function getCookie(name){
  var cname = name + "=";               
  var dc = document.cookie;             
  if (dc.length > 0) {              
    begin = dc.indexOf(cname);       
    if (begin != -1) {           
      begin += cname.length;       
      end = dc.indexOf(";", begin);
      if (end == -1) end = dc.length;
        return unescape(dc.substring(begin, end));
    } 
  }
  return null;
}

function setCookie(name, value, expires, path, domain, secure) {
  document.cookie = name + "=" + escape(value) + 
  ((expires == null) ? "" : "; expires=" + expires.toGMTString()) +
  ((path == null) ? "" : "; path=" + path) +
  ((domain == null) ? "" : "; domain=" + domain) +
  ((secure == null) ? "" : "; secure");
}

function valorCookieBanner(){
	if ( getCookie( 'BannerEDIPO' ) == 1 )
		setCookie ('BannerEDIPO', 0, caduca)
	else
		setCookie ('BannerEDIPO', 1, caduca)
	return getCookie( 'BannerEDIPO' );
}

if ( valorCookieBanner() == 1 )
	document.write( "<a href='http://www.grancabeza.com/adserver/adclick.php?n=a47ac489&bannerid=345' target='_blank'><img src='http://www.grancabeza.com/adserver/adview.php?clientid=262&amp;n=a47ac489' border='0' alt=''></a>" );
else
	document.write( "<a href='http://www.grancabeza.com/adserver/adclick.php?n=a2b70f8d&bannerid=348' target='_blank'><img src='http://www.grancabeza.com/adserver/adview.php?clientid=261&amp;n=a2b70f8d' border='0' alt=''></a>" );